Five Pennsylvania endorsements, five different candidates. Another Pennsylvania presidential endorsement is in and another hopeful gets added to the list of Pennsylvania favorites. Democratic Congressman Mike Doyle of Pittsburgh is backing New Mexico Gov. Bill Richardson.

"Having known Governor Richardson for many years, I have always been impressed by his experience, ability, and sincere commitment to our country," Doyle said in a statement. "Our next President has to be prepared to address difficult challenges here at home -- and re-establish our standing abroad. I'm confident that Bill Richardson is the best choice to lead us back in the right direction, and I am proud to endorse his candidacy."

Doyle's endorsement is the fifth from Pennsylvania so far in the '08 race. None have gone for the same candidate.